This is a pre-cut kit for you to build an accurate box kit for your carbonite build. It comes in high regard from builders around the world, and with high praise from the RPF and TDH forum members. The pieces are CNC cut to precision dimensions, with all of the accurate tapers and angles to build the trapezoidal box shape. The side cutouts will fit volvo panel casts. Shipping is included for US buyers. We can also arrange for delivery in Canada, EU, an Australia for a modest additional fee as we have production partners in those regions.